Abstract
The formation process of the burden distribution at blast furnace top was dynamically and quantitatively investigated by the use of a two-dimensional mathematical model, in which the equations of motion on each particle were approximated by a rheological model. In order to increase the estimation accuracy of the model, the dashpot factor, which represents the kinetic energy dissipation during the formation of the burden distribution, was experimentally determined.
The following knowledge was obtained through the application of the model.
The slope angle has significant influence on the burden deposit behavior throughout the charging. The size segregation phenomenon on the slope can be quantitatively evaluated by the model. The change of the charging condition of small particles onto the slope results in the change of the small particle distribution on the slope as well as the change of the deposit profile. The decrease of charging rate caused by the increase of charging time reduces the thickness of the flowing layer of particles to result in the enhancement of the sieving of small particles on the slope.
